the longer you have diabetes, the more likely you are to develop diabetic retinopathy.
Symptoms
Diabetic
retinopathy usually affects both eyes.



虹膜:iris , Irid/o--, Iridotomy虹膜切开术，iridectomy虹膜切除术，iridocyclitis虹膜睫状 体炎 睫状体：ciliary body 脉络膜:choroid , Choroid/o--, choroidal脉络膜的，choroidoretinitis脉络膜视网膜炎 视网膜：retin/o retinitis视网膜炎，retinopathy视网膜病变,diabetic retinopathy糖尿 病视网膜病变 瞳孔:pupil ,Pupill/o--,pupillomotor瞳孔运动的，pupillometer瞳孔计


Gastrointestinalrrhage 消化道出血

Advanced diabetic retinopathy. Proliferative diabetic retinopathy (PDR) is the most severe type of diabetic retinopathy.
玻璃体:vitreous ，Vitre/o--, vitreous玻璃体的, Vitrectomy玻璃体切除术, Jelly-like :胶状的


Eventually, scar tissue stimulated by the growth of new blood vessels may cause the retina to detach（脱离） from the back of your eye.

symptoms

In fact, up to 45 percent of adults diagnosed with diabetes in China have some degree of diabetic retinopathy, according to the National Eye Institute.
As the condition progresses, the smaller vessels may close entirely and the larger retinal veins may begin to dilate（扩大） and become irregular in diameter（直径）. Nerve fibers in the retina may begin to swell.

Definition

Diabetic retinopathy is a complication of diabetes that results from damage to the blood vessels of the light-sensitive tissue at the back of the eye (retina).
capillary ,Capill/o- , n.& adj.毛细管(的) Capillaritis毛细管炎


Symptoms

At first, diabetic retinopathy may cause no symptoms or only mild vision problems.
Symptoms
Symptoms

As the condition progresses, diabetic retinopathy symptoms may include: A) Spots floating in your vision B) Blurred vision C)Dark streaks or a red film that blocks your vision D) Poor night vision E) Vision loss
Diabetic retinopathy is usually classified as early or advanced.

Early diabetic retinopathy. Nonproliferative diabetic retinopathy (NPDR) is the most common type of diabetic retinopathy. It can be described as mild, moderate or severe.
Sometimes the central part of the retina (macula) begins to swell, too. This is known as macular edema. Macula : 黄斑 Macular edema ：黄斑水肿

terms
Extensive ：广泛的，大量的 Intraretinal microvascular abnormalitis （IRMA）视网膜 内微血管异常 Intraretinal : 视网膜内部的 Microvascular ：微血管的 Cotton wool spots : 棉绒斑 Hemorrhage ：出血 Roots that means blood：Hemo- ，hema- ,hem-, haemo- ,haema- ,haem -rrhage ,出血，流血

When you have PDR, abnormal blood vessels grow in the retina.

Sometimes the new blood vessels grow or leak into the vitreous (the clear, jelly-like substance that fills the center of your eye ).
cause

Diabetic retinopathy can happen to anyone who has type 1 diabetes or type 2 diabetes.
Causes

When you have diabetes, your body doesn't use sugar (glucose) properly.
You
can have diabetic retinopathy and not know it. In fact, symptoms are unusual in the early stages of diabetic retinopathy.
Symptoms
Eventually, however, diabetic retinopathy can result in blindness. In China ,diabetic retinopathy is a leading cause of blindness in adults.
Peripheral : 外围的，不重要的 Peri- ，外围的，周围的 Perinatal 围产期的，出生前后的 Periportal 门静脉周的， Periarteritis 动脉周围炎， periappendicitis 阑尾周炎

Exudative maculopathy : 渗出性黄斑病变 Hard exudates :硬渗出物 Hard exudates and hemorrhages lateral to macula ：单侧性黄斑硬性渗出和出血 Lateral :侧部的
Microaneurysms : 微动脉瘤，微血管瘤

In the early stages of diabetic retinopathy, the walls of the blood vessels in your retina weaken. Tiny bulges protrude from the vessel walls, sometimes leaking or oozing fluid and blood into the retina. As diabetic retinopathy progresses, new blood vessels may grow and threaten your vision.
The normal structure of the eyeball
Terms



角膜：cornea Corne/o--, Cornea角膜， Megacornea大角膜， Microcornea小角膜， Kerat/o--, Keratitis角膜炎， Keratomalacia角膜软化症 巩膜：sclera Scler/o--, Scleritis巩膜炎， Episcleritis表层巩膜炎， Episclera巩膜上层 （epi--，beyond something）,epidermis表皮，上皮 Epidermal表皮的，外皮的
If
the new blood vessels interfere with the normal flow of fluid out of the eye, pressure may build up in the eyeball. This can damage the optic nerve . (The nerve that carries images from your eye to your brain ).
Causes

If your blood sugar level is too high, your natural lens may swell — which can blur your vision.